Make use of the NELEMS and KEYCODE_SPACE macro. Also, remove an unused parameter.

java/src/com/android/inputmethod/latin/BinaryDictionary.java

...ve/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp

...ve/jni/com_android_inputmethod_latin_BinaryDictionary.cpp

.../jni/com_android_inputmethod_latin_DicTraverseSession.cpp

native/jni/src/char_utils.cpp

native/jni/src/correction.cpp

native/jni/src/correction.h

native/jni/src/defines.h

native/jni/src/dictionary.cpp

native/jni/src/dictionary.h

native/jni/src/proximity_info_state.cpp

native/jni/src/unigram_dictionary.cpp

native/jni/src/unigram_dictionary.h